Comparing Materials for CNC Spoilboard
From contributor D:
We use 18mm MDF as well. We just buy in a pack and get the apprentice to paint the edges while the sheets are in the pack with any sort of paint. Two coats works great. These work well - we use them down to about 6mm thick. Cheap, easy, no problems.
From contributor J:
I also find 3/4" MDF to work the best. Once it gets below 1/4", we replace with new one. Once the board gets below 3/16", we had a hard time keeping them flat. The only advantage I see in using 1/4" board is if you want to unload machined parts with the board to speed up start of next nest cycle. An operator can easily unload 4x8 or 5x8 melamine parts with thinner boards. If you don't mind frequent replacement of the boards, you can reduce machine idle time due to unloading cycle.
From contributor B:
Just get the cheap 3/4" MDF Home Depot carries. It works the best.
From contributor S:
I have had the best luck with 1/2 inch ultra-lite LDF or 3/8 thunderboard. These two materials breathe better than anything else I've tried. The ultra-lite also surfaces nicely so you can get more life out of a sheet.
From contributor G:
If you can dedicate spoilboard to applications, try expanded PVC for your spoil (Sintra, Komotex, Celtec). It is all closed cell, so you will have 0% leakage. It's what we use 90% of the time and it works for us. Give it a try.
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